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This cyst, lateral to and compressing the spinal cord, does not communicate with the subarachnoid space. (Contributed by Dr. Sherman Stein.)
Neuro-Ophthalmology & Neuro-Otology
Oct. 07, 2020
Primary CNS lymphoma is a non-Hodgkin (typically B-cell) lymphoma that arises within, and generally remains confined to, the nervous system. It usually occurs in the brain as an intracranial mass (masses) but may also involve the spinal cord parenchyma, leptomeninges, and eyes. The overwhelming majority of patients presents with symptoms and signs suggestive of a brain tumor.
Dec. 08, 2020
Neuropharmacology & Neurotherapeutics
Sep. 02, 2020
Jul. 07, 2021
Childhood Degenerative & Metabolic Disorders
Citrullinemia is a term for 2 different inherited defects of the urea cycle: deficiency of the enzyme argininosuccinate synthetase (classic citrullinemia,
Aug. 04, 2019
Benign paroxysmal positional vertigo (BPPV) is the most common vestibular disorder. The cardinal feature of the disorder is disabling vertigo provoked by changes of head position. Several variants have been recognized, reflecting involvement of the posterior, horizontal, or anterior semicircular canal by canalolithiasis or cupulolithiasis.
May. 16, 2021
May. 07, 2020
Hemifacial spasm is a peripherally induced movement disorder characterized by repetitive clonic or more sustained spasms that synchronously affect muscles innervated by the facial nerve. Compression of the facial nerve at its junction with the brainstem, by vascular or other structures, appears to cause secondary hyperexcitability of the facial nucleus that seems to underlie most cases of hemifacial spasm.
Apr. 26, 2020